[BUG] better error reporting and error handling for instantiated clients without credentials

[KenEucker]

Describe the bug
If you attempt to get BikeTag data from a BikeTagClient object without setting adequate credentials, the following unhelpful error is returned:
TypeError: Cannot read properties of undefined (reading 'fetch') at http://prime.localhost:8080

When what is happening is that a request is being made without credentials:

To Reproduce
Steps to reproduce the behavior:

1. create a new BikeTagClient (const biketag = new BikeTagClient())
2. attempt to call biketag.getGame(undefined)
3. See error

Expected behavior
An error that indicates that adequate credentials are not present should be returned.